/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xerces.internal.util;

import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;

import com.sun.org.apache.xerces.internal.xni.parser.XMLInputSource;

/**
 * <p>An <code>XMLInputSource</code> analogue to <code>javax.xml.transform.stax.StAXSource</code>.</p>
 *
 * @version $Id: StAXInputSource.java,v 1.2 2010-10-26 23:01:17 joehw Exp $
 */
public final class StAXInputSource extends XMLInputSource {

  private final XMLStreamReader fStreamReader;
  private final XMLEventReader fEventReader;
  private final boolean fConsumeRemainingContent;

  public StAXInputSource(XMLStreamReader source) {
    this(source, false);
  }

  public StAXInputSource(XMLStreamReader source, boolean consumeRemainingContent) {
    super(null, source.getLocation().getSystemId(), null);
    if (source == null) {
      throw new IllegalArgumentException("XMLStreamReader parameter cannot be null.");
    }
    fStreamReader = source;
    fEventReader = null;
    fConsumeRemainingContent = consumeRemainingContent;
  }

  public StAXInputSource(XMLEventReader source) {
    this(source, false);
  }

  public StAXInputSource(XMLEventReader source, boolean consumeRemainingContent) {
    super(null, getEventReaderSystemId(source), null);
    if (source == null) {
      throw new IllegalArgumentException("XMLEventReader parameter cannot be null.");
    }
    fStreamReader = null;
    fEventReader = source;
    fConsumeRemainingContent = consumeRemainingContent;
  }

  public XMLStreamReader getXMLStreamReader() {
    return fStreamReader;
  }

  public XMLEventReader getXMLEventReader() {
    return fEventReader;
  }

  public boolean shouldConsumeRemainingContent() {
    return fConsumeRemainingContent;
  }

  public void setSystemId(String systemId) {
    throw new UnsupportedOperationException("Cannot set the system ID on a StAXInputSource");
  }

  private static String getEventReaderSystemId(XMLEventReader reader) {
    try {
      if (reader != null) {
        return reader.peek().getLocation().getSystemId();
      }
    } catch (XMLStreamException e) {
    }
    return null;
  }

} // StAXInputSource
